what is the motor coupled to?
Its a vacuum blower used for a CNC router saw
take it you have already done all the usual tests I.R. phase balance etc.?
I have not done IR testing yet as the equipment is split new .. on monday morning i will but i'm doubtful that its a fault with the equipment
If so remove coupling and wish really hard that the fault is mechanical.....
Haha I wish but like i say it's all brand new
what make of mcb is it? can you adjust the In setting like most mccb's.
Its a control gear LEB Type C Triple pole MCB with no adjustment setting (not exactly a great make but the job had to be within a low budget , standard!! )
If not consider changing to an MCCB to take advantage of this feature.
This is a good shout or could i go up to type D?
you really havent given enough detail in your Op to help much buddy. so i have used a scattergun approach to advising.
Thanks mate .. I'm new to the forum and every commercial/industrial job i've been on in the past i've worked for companies like offshore where i'm under guidance and the planning is done by engineers in the office.. I was asked by a neighbour to undertake the job to help him out and initially thought i had enough relevant experience as an electrician to plan and select the correct equipment .. The motors FLC is 16A but the running current is 6A . I am running the 3Phase CNC router of the same 40A supply to the sub board and have used a 10A typeC triple pole MCB for the CNC and a 16A type C triple pole MCB for the Vacuum induction motor.. I thought the Type C would allow for the in-rush .. Thanks again
(I have colour coded your responses as it made for a difficult to read post otherwise..cheers Darkwood.)